Wastewater: From Waste to Resource – The Case of San Luis Potosí, Mexico
Water is scarce in the state of San Luis Potosí, Mexico. With more than 2.7 million inhabitants in the metropolitan area (as of 2015) and intensive industrial and economic development, the region gets less than 400 mm of rainfall a year. The state government has been a pioneer in understanding wastewater as a resource to utilize rather than a waste only to dispose. Since the 1990s, the city’s development has been tied to water conservation efforts and wastewater reuse. Given the area’s fast growth, the aquifer was being depleted, with extractions doubling its natural recharge.